Analysis on flow around a sphere at high Mach number, low reynolds number and adiabatic condition for high accuracy analysis of gas particle flows

T. Nagata, T. Nonomura, S. Takahashi, Y. Mizuno, K. Fukuda

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This study analyses gas particle flow around a sphere under an adiabatic condition at high Mach number and low Reynolds number by direct numerical simulation of the three- dimensional compressible Navier-Stokes equation to investigate flow properties. The calculation was performed on a boundary-fitted coordinate system with a high-order scheme of sufficient accuracy. Analysis is conducted by assuming a rigid sphere with a Reynolds number based on the diameter of the sphere, and the free-stream velocity set between 50 and 300 and a free-stream Mach number set between 0.3 and 2.0. The effect of the Mach number on the flow properties and drag coefficient are discussed. The calculation shows the following results: 1) unsteady fluctuation of the hydrodynamic force becomes smaller as the Mach number increases, 2) the drag coefficient increases along with the Mach number due to an increase in the pressure drag by the shock-wave, and 3) an accurate prediction of the drag coefficient in the supersonic regime using traditional models might be difficult.

本文言語English
ホスト出版物のタイトルCOUPLED PROBLEMS 2015 - Proceedings of the 6th International Conference on Coupled Problems in Science and Engineering
編集者Eugenio Onate, Manolis Papadrakakis, Bernhard A. Schrefler
出版社International Center for Numerical Methods in Engineering
ページ760-771
ページ数12
ISBN(電子版)9788494392832
出版ステータスPublished - 2015 4月 1
外部発表はい
イベント6th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2015 - Venice, Italy
継続期間: 2015 5月 182015 5月 20

出版物シリーズ

名前COUPLED PROBLEMS 2015 - Proceedings of the 6th International Conference on Coupled Problems in Science and Engineering

Other

Other6th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2015
国/地域Italy
CityVenice
Period15/5/1815/5/20

ASJC Scopus subject areas

  • 計算数学
  • 工学(全般)
  • 応用数学

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